桥接接缝的MS密封胶缝设计

发布时间 : 2025-11-29 11:28:52
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(Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.

桥接接缝的MS密封胶缝设计

(Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.

发布时间 : 2025-11-29 11:28:52
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桥接接缝指MS密封胶跨越狭窄缝隙并在两侧平面基材上形成粘接的构造，适用于缝宽较窄、无法设置标准对接或角接构造的特殊部位，属于受限条件下的替代方案。其基本构造如图所示。

桥接接缝的整体宽度、深度与对接接缝差异较大，其有效的宽深比应以背衬材料上部有效胶层计算。有效胶层的设计参数，包括宽深比、宽度、最小深度等，应参照对接接缝的要求执行。

施工要求

在实际工程实践中，混凝土接缝密封常出现的问题包括MS密封胶的粘接破坏和失去弹性。为避免这些问题，需选择相应级别的合适MS密封胶、适宜的胶缝设计以及严格的施工要求。

基材表面的要求

MS密封胶施工中，对基层有基本要求:基层应牢固、干燥，表面应干净、平整、密实，不得有蜂窝、麻面、起皮、起砂等缺陷。针对混凝土材料本身为多孔性基材，且可能存在隔离层、软弱层、不易干燥等情况，对其表面处理作如下特殊说明:

D混凝土表面的蜂窝、麻面、起皮、起砂等缺陷，应剔除松散、软弱层;大面积缺陷应制定专项处理方案，局部零星缺陷清理至符合要求后方可进行MS密封胶施工。

2)混凝土表面可能残留一层强度不高的素浆，施工前应予以清除。

3)当基层含水率可能过高时，可采用美纹纸粘贴法进行简易判断:若美纹纸无法有效粘贴，表明表面潮湿，不宜施工。不建议采用火焰烘烤干燥，以免导致基层开裂或回潮，影响粘结性能。

4)混凝土表面残留的脱模剂应彻底清除，以防脱模剂中所含的矿物油以及矿物油与混凝土中的碱反应生成“金属皂”形成隔离层，影响MS密封胶与基层的粘接效果。

背衬材料

背衬材料是控制MS密封胶胶层厚度的关键，选用不合适的背衬材料可能导致MS密封胶厚度不足、三面粘接等施工质量问题。MS密封胶施工中，通常选用PE泡沫棒作为背衬材料，直径宜为接缝宽度的1.21.5倍，以确保其在接缝中被适度压缩后能稳固嵌入，防止施胶过程中发生位移(若泡沫棒过窄，易导致支撑不牢、胶体下垂或厚度失掬。施工时不得使用尖锐工具进行填塞，并保证平整以控制MS密封胶的厚度。http://www.sdyuantai.com/

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